An Irishman, Englishman and American in a Tree

An Irishman, and Englishman and an American man were stuck up in a tree, hanging on to a branch for dear life. The branch they were hanging on to started to crack as it couldn't hold all of their weight.

The American refused to let go, as did the Englishman.

The Irishman said, "I'll be the better man. Since this branch won't hold all of our weight, I'll let go and sacrifice myself."